QA-QC of IMRT: European Perspective

Wagter, Carlos De

doi:10.1007/3-540-30356-1_10

Cited by 4 publications

(2 citation statements)

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“…Three-dimensional polymer gel dosimetry as validation method was described elsewhere [8,49]. Following the strate- gy outlined in [8] (pages 117-128 by De Wagter), further quality assurance (QA) was streamlined into patient-specific QA by delivering the clinical treatment plan to "CarPet", an anthropomorphic pelvic phantom [18], transversally loaded with one or more radiochromic energy-independent EBT films (International Specialty Products Corporation, Wayne, NJ, USA) [38] and by comparing the measured dose distributions to the ones that were computed for CarPet using the Pinnacle treatment planning system.…”

Section: Physical and Dosimetric Quality Assurance Aspectsmentioning

confidence: 99%

Intensity-Modulated Arc Therapy with Simultaneous Integrated Boost in the Treatment of Primary Irresectable Cervical Cancer

et al. 2009

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Section: Physical and Dosimetric Quality Assurance Aspectsmentioning

confidence: 99%

Intensity-Modulated Arc Therapy with Simultaneous Integrated Boost in the Treatment of Primary Irresectable Cervical Cancer

et al. 2009

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“…After gaining experience, the IMRT QA is usually subdivided into a multileaf collimator (MLC)/linac-specific QA part and a patient-specific QA part. Both parts are parallel procedures and do not interfere directly [5]. When going this way, patient-specific verification of IMRT plans can be done by dosimetric measurements or by independent dose or MU calculations.…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo simulations to replace film dosimetry in IMRT verification

Goetzfried

Rickhey

Treutwein³

et al. 2011

Zeitschrift für Medizinische Physik

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Patient-specific verification of intensity-modulated radiation therapy (IMRT) plans can be done by dosimetric measurements or by independent dose or monitor unit calculations. The aim of this study was the clinical evaluation of IMRT verification based on a fast Monte Carlo (MC) program with regard to possible benefits compared to commonly used film dosimetry.25 head-and-neck IMRT plans were recalculated by a pencil beam based treatment planning system (TPS) using an appropriate quality assurance (QA) phantom. All plans were verified both by film and diode dosimetry and compared to MC simulations. The irradiated films, the results of diode measurements and the computed dose distributions were evaluated, and the data were compared on the basis of gamma maps and dose-difference histograms.Average deviations in the high-dose region between diode measurements and point dose calculations performed with the TPS and MC program were 0.7 ± 2.7 % and Preprint submitted to Elsevier 11 February 20101.2 ± 3.1 %, respectively. For film measurements, the mean gamma values with 3 % dose difference and 3 mm distance-to-agreement were 0.74 ± 0.28 (TPS as reference) with dose deviations up to 10 %. Corresponding values were significantly reduced to 0.34 ± 0.09 for MC dose calculation. The total time needed for both verification procedures is comparable, however, by far less labor intensive in the case of MC simulations.The presented study showed that independent dose calculation verification of IMRT plans with a fast MC program has the potential to eclipse film dosimetry more and more in the near future. Thus, the linac-specific QA part will necessarily become more important. In combination with MC simulations and due to the simple set-up, point-dose measurements for dosimetric plausibility checks are recommended at least in the IMRT introduction phase.

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Atamel¹,

Erturk²

2012

Principles and Practice of Modern Radiotherapy Techniques in Breast Cancer

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QA-QC of IMRT: European Perspective

Cited by 4 publications

References 37 publications

Intensity-Modulated Arc Therapy with Simultaneous Integrated Boost in the Treatment of Primary Irresectable Cervical Cancer

Intensity-Modulated Arc Therapy with Simultaneous Integrated Boost in the Treatment of Primary Irresectable Cervical Cancer

Monte Carlo simulations to replace film dosimetry in IMRT verification

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